Hello,
I want to extract points from line feature from shapefile.
I have search for solutions, it shows that most of people
use gis:vertex-lists-of to do this.
However I got an error message below when I try to do that:
Extension exception: not a VectorFeature:
org.myworldgis.netlogo.VectorDataset @ca24265
error while observer running GIS:VERTEX-LISTS-OF
called by procedure DRAW-CITIES
called by Button 'draw-cities'
Code below:
to draw-cities
gis:set-drawing-color red
gis:draw cities-dataset 1
foreach gis:vertex-lists-of cities-dataset [
a ->
]
end
cities-dataset is a points collection shapefile from Netlogo library ""GIS
general examples" model
I don't understand that even I put a points feature in the function, I just
got an error.
Do I misuse the function? How can I corectly use it? Thank you.
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